Item RH028001: There are 20 different types of amino acids that are used to make protein molecules, not one, three, or four.

How many different types of amino acids are used to make protein molecules?

  1. One
  2. Three
  3. Four
  4. Twenty

Distribution of Responses

Chart showing distrubtion of responses for Item RH028001

Percent of students responding correctly

Overall17%
Grades 6–816%
Grades 9–1218%
Male18%
Female16%
Primary Language is English17%
Primary Language is not English14%

View data table